IP Address Lookups and Mapping

Services exist to compute a location (lat/long) for an IP address. This
can be used for targeted advertising when you log onto a site (it gets your
location before returning a page to you, and thus can tailor the ads you see), or to track the locations of people
interested in your web site.

To get your IP address:

Open a command prompt window, and type "IPCONFIG". The
resulting address might actually be internal, if it starts with
10.xxx.xxx.xxx or 192.168.xxx.sss.

Open
http://www.whatsmyip.org/ This should give you the external
IP address that the web sites you visit will see, which might be
something like 131.121.xxx.xxx.

Every time a user visits a web site, the GET request is recorded in
the server's log files and can be reviewed by the site administrators.
The log includes the user's IP address (81.151.167.157),
the date and time, the URL requested, the version of the HTTP protocol,
the success/failure code (200 = OK), and the number of bytes returned to
the client (MICRODEM_Setup required 82 MB).

These are requests to
download MICRODEM (IP addresses have been randomly altered).

Download locations for MICRODEM in March
2011. The IP addresses were extracted from
the server logs, run through an IP address
lookup, and then turned into a GIS database for
plotting.

http://www.zonums.com/iptools/ipmapper.php will do 50 at a time, put the
results on a Google Maps display, and allow export in a number of format.
(As a least common denominator, you want KML since the others will all have
problems with inconsistent treatment of the place names, which we will forgo).